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arXiv · astro-ph/0610117

Relativistic blue- and red-shifted absorption lines in AGNs

M. Cappi
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Abstract

Current, accumulating evidence for (mildly) relativistic blue- and red-shifted absorption lines in AGNs is reviewed. XMM-Newton and Chandra sensitive X-ray observations are starting to probe not only the kinematics (velocity) but also the dynamics (accelerations) of highly ionized gas flowing in-and-out from, likely, a few gravitational radii from the black hole. It is thus emphasized that X-ray absorption-line spectroscopy provides new potential to map the accretion flows near black holes, to probe the launching regions of relativistic jets/outflows, and to quantify the cosmological feedback of AGNs. Prospects to tackle these issues with future high energy missions are briefly addressed.

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M. Cappi. 2006-10-04. Relativistic blue- and red-shifted absorption lines in AGNs. https://doi.org/10.1002/asna.200610639

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